<template>
  <div class="sc-upload" :class="{ 'sc-upload-round': round }" :style="style">
    <div v-if="file && file.status != 'success'" class="sc-upload__uploading">
      <div class="sc-upload__progress">
        <el-progress
          :percentage="file.percentage"
          :text-inside="true"
          :stroke-width="16"
        />
      </div>
      <el-image class="image" :src="file.tempFile" fit="cover"></el-image>
    </div>
    <div v-if="file && file.status == 'success'" class="sc-upload__img">
      <el-image
        class="image"
        :src="file.url"
        :preview-src-list="[file.url]"
        fit="cover"
        hide-on-click-modal
        append-to-body
        :z-index="9999"
      >
        <template #placeholder>
          <div class="sc-upload__img-slot">Loading...</div>
        </template>
      </el-image>
      <div class="sc-upload__img-actions" v-if="!disabled">
        <span class="del" @click="handleRemove()"
          ><el-icon><el-icon-delete /></el-icon
        ></span>
      </div>
    </div>
    <el-upload
      v-if="!file"
      class="uploader"
      ref="uploader"
      :auto-upload="cropper ? false : autoUpload"
      :disabled="disabled"
      :show-file-list="showFileList"
      :action="action"
      :name="name"
      :data="data"
      :headers="headers"
      :accept="accept"
      :limit="1"
      :on-change="change"
      :http-request="request"
      :before-upload="before"
      :on-success="success"
      :on-error="error"
      :on-exceed="handleExceed"
    >
      <slot>
        <div class="el-upload--picture-card">
          <div class="file-empty">
            <el-icon><component :is="icon" /></el-icon>
            <h4 v-if="title">{{ title }}</h4>
          </div>
        </div>
      </slot>
    </el-upload>
    <span style="display: none !important"
      ><el-input v-model="value"></el-input
    ></span>
    <el-dialog
      title="剪裁"
      draggable
      v-model="cropperDialogVisible"
      :width="580"
      @closed="cropperClosed"
      destroy-on-close
    >
      <sc-cropper
        :src="cropperFile.tempCropperFile"
        :compress="compress"
        :aspectRatio="aspectRatio"
        ref="cropper"
      ></sc-cropper>
      <template #footer>
        <el-button @click="cropperDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="cropperSave">确 定</el-button>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { defineAsyncComponent } from 'vue'
import { genFileId } from 'element-plus'
const scCropper = defineAsyncComponent(() => import('@/components/scCropper'))
import config from "@/config/upload"

export default {
  props: {
    modelValue: { type: String, default: "" },
    height: { type: Number, default: 148 },
    width: { type: Number, default: 148 },
    title: { type: String, default: "" },
    icon: { type: String, default: "el-icon-plus" },
    action: { type: String, default: "/api/admin/file" },
    apiObj: { type: Object, default: () => { } },
    name: { type: String, default: config.filename },
    data: { type: Object, default: () => { } },
    accept: { type: String, default: "image/gif, image/jpeg, image/png, image/webp" },
    maxSize: { type: Number, default: config.maxSizeFile },
    limit: { type: Number, default: 1 },
    autoUpload: { type: Boolean, default: true },
    showFileList: { type: Boolean, default: false },
    disabled: { type: Boolean, default: false },
    round: { type: Boolean, default: false },
    onSuccess: { type: Function, default: () => { return true } },
    headers: { type: Object, default: () => { } },
    cropper: { type: Boolean, default: false },
    compress: { type: Number, default: 1 },
    aspectRatio: { type: Number, default: NaN }
  },
  components: {
    scCropper
  },
  data () {
    return {
      value: "",
      file: null,
      style: {
        width: this.width + "px",
        height: this.height + "px"
      },
      cropperDialogVisible: false,
      cropperFile: null
    }
  },
  watch: {
    modelValue (val) {
      this.value = val
      this.newFile(val)
    },
    value (val) {
      this.$emit('update:modelValue', val)
    }
  },
  mounted () {
    this.value = this.modelValue
    this.newFile(this.modelValue)
  },
  methods: {
    newFile (url) {
      if (url) {
        this.file = {
          status: "success",
          url: url
        }
      } else {
        this.file = null
      }
    },
    cropperSave () {
      this.$refs.cropper.getCropFile(file => {

        file.uid = this.cropperFile.uid
        this.cropperFile.raw = file

        this.file = this.cropperFile
        this.file.tempFile = URL.createObjectURL(this.file.raw)
        this.$refs.uploader.submit()

      }, this.cropperFile.name, this.cropperFile.type)
      this.cropperDialogVisible = false
    },
    cropperClosed () {
      URL.revokeObjectURL(this.cropperFile.tempCropperFile)
      delete this.cropperFile.tempCropperFile
    },
    handleRemove () {
      this.clearFiles()
    },
    clearFiles () {
      URL.revokeObjectURL(this.file.tempFile)
      this.value = ""
      this.file = null
      this.$nextTick(() => {
        this.$refs.uploader.clearFiles()
      })
    },
    change (file, files) {
      if (files.length > 1) {
        files.splice(0, 1)
      }
      if (this.cropper && file.status == 'ready') {
        const acceptIncludes = ["image/gif", "image/jpeg", "image/png", "image/webp"].includes(file.raw.type)
        if (!acceptIncludes) {
          this.$notify.warning({
            title: '上传文件警告',
            message: '选择的文件非图像类文件'
          })
          return false
        }
        this.cropperFile = file
        this.cropperFile.tempCropperFile = URL.createObjectURL(file.raw)
        this.cropperDialogVisible = true
        return false
      }
      this.file = file
      if (file.status == 'ready') {

        file.tempFile = URL.createObjectURL(file.raw)
      }
      console.log(this.file)
    },
    before (file) {
      const acceptIncludes = this.accept.replace(/\s/g, "").split(",").includes(file.type)
      if (!acceptIncludes) {
        this.$notify.warning({
          title: '上传文件警告',
          message: '选择的文件非图像类文件'
        })
        this.clearFiles()
        return false
      }
      const maxSize = file.size / 1024 / 1024 < this.maxSize
      if (!maxSize) {
        this.$message.warning(`上传文件大小不能超过 ${this.maxSize}MB!`)
        this.clearFiles()
        return false
      }
    },
    handleExceed (files) {
      const file = files[0]
      file.uid = genFileId()
      this.$refs.uploader.handleStart(file)
    },
    success (res, file) {
      //释放内存删除blob
      URL.revokeObjectURL(file.tempFile)
      delete file.tempFile
      var os = this.onSuccess(res, file)
      if (os != undefined && os == false) {
        this.$nextTick(() => {
          this.file = null
          this.value = ""
        })
        return false
      }
      var response = config.parseData(res)
      file.name = response.fileName
      file.url = response.src
      this.value = file.url
      this.$emit('getImgData', res.data)
      if (res.code == 200) {
        this.$notify.success({
          title: '成功',
          message: '文件上传成功',
        })
      }

    },
    error (err) {
      this.$nextTick(() => {
        this.clearFiles()
      })
      this.$notify.error({
        title: '上传文件未成功',
        message: err
      })
    },
    request (param) {
      var apiObj = config.apiObj
      if (this.apiObj) {
        apiObj = this.apiObj
      }
      const data = new FormData()
      data.append(param.filename, param.file)
      for (const key in param.data) {
        data.append(key, param.data[key])
      }
      apiObj.post(data, {
        onUploadProgress: e => {
          const complete = parseInt(((e.loaded / e.total) * 100) | 0, 10)
          param.onProgress({ percent: complete })
        }
      }).then(res => {
        var response = config.parseData(res)
        if (response.code == config.successCode) {
          param.onSuccess(res)
        } else {
          param.onError(response.msg || "未知错误")
        }
      }).catch(err => {
        param.onError(err)
      })
    }
  }
}
</script>

<style scoped>
.el-form-item.is-error .sc-upload .el-upload--picture-card {
  border-color: var(--el-color-danger);
}
.sc-upload .el-upload--picture-card {
  border-radius: 0;
}

.sc-upload .uploader,
.sc-upload:deep(.el-upload) {
  width: 100%;
  height: 100%;
}

.sc-upload__img {
  width: 100%;
  height: 100%;
  position: relative;
}
.sc-upload__img .image {
  width: 100%;
  height: 100%;
}
.sc-upload__img-actions {
  position: absolute;
  top: 0;
  right: 0;
  display: none;
}
.sc-upload__img-actions span {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 25px;
  height: 25px;
  cursor: pointer;
  color: #fff;
}
.sc-upload__img-actions span i {
  font-size: 12px;
}
.sc-upload__img-actions .del {
  background: #f56c6c;
}
.sc-upload__img:hover .sc-upload__img-actions {
  display: block;
}
.sc-upload__img-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  font-size: 12px;
  background-color: var(--el-fill-color-lighter);
}

.sc-upload__uploading {
  width: 100%;
  height: 100%;
  position: relative;
}
.sc-upload__progress {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--el-overlay-color-lighter);
  z-index: 1;
  padding: 10px;
}
.sc-upload__progress .el-progress {
  width: 100%;
}
.sc-upload__uploading .image {
  width: 100%;
  height: 100%;
}

.sc-upload .file-empty {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
.sc-upload .file-empty i {
  font-size: 28px;
}
.sc-upload .file-empty h4 {
  font-size: 12px;
  font-weight: normal;
  color: #8c939d;
  margin-top: 8px;
}

.sc-upload.sc-upload-round {
  border-radius: 50%;
  overflow: hidden;
}
.sc-upload.sc-upload-round .el-upload--picture-card {
  border-radius: 50%;
}
.sc-upload.sc-upload-round .sc-upload__img-actions {
  top: auto;
  left: 0;
  right: 0;
  bottom: 0;
}
.sc-upload.sc-upload-round .sc-upload__img-actions span {
  width: 100%;
}
</style>
